Also, if you look over in the upper left of ATP's page, you see the big ATP logo. Just under that is a search area. Type in "daylily" and click the little magnifying glass to start the search. The first things to come up are the articles and tips that involve daylilies. If you look down through the list, there are quite a few that include photos of gardens and have other types of plants. You might get some good ideas there.

Yes, that is cabbage with Piping Rock. A few years ago I had red cabbage and a very large green cabbage growing near it. Neither was picked that summer. The following winter was mild and the cabbages did not die. The following summer they bloomed and I saved seeds from the white cabbage, and this is the resulting hybrid. It is gorgeous.

Yes it is. You could just plant as a companion. I have done this with Tuscan Kale and Purple Fennel, now that I think of it! Also Purple mustard, although that one reseeded so plentifully that I think they have all been weeded out!

Oh, yes I know about that !! lesson learned the hard way
I wondered if those kind of plants put off some kind of oil ect that prohibits the growth of other plants kind of like walnuts do? I planted some artemisia once and the plants around it didn't seem to thrive after that. Maybe it was coincidence though.